Home / 20,553.72-30,830.58-13,161.66

Finding the Fourth Proportional to 20,553.72, 30,830.58 and 13,161.66

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Solution

The fourth proportional to 20,553.72, 30,830.58 and 13,161.66 is: 19,742.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.72 : 30,830.58 = 13,161.66 : x
  2. Step 2: Convert to fraction form
    20,553.72/30,830.58 = 13,161.66/x
  3. Step 3: Cross multiply
    20,553.72x = 30,830.58 × 13,161.66
  4. Step 4: Simplify right side
    20,553.72x = 405,781,611.56
  5. Step 5: Solve for x
    x = 405,781,611.56/20,553.72
  6. Step 6: Final answer
    x = 19,742.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.